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参数资料
| 型号： | ADT7467ARQ-REEL |
| 厂商： | ON Semiconductor |
| 文件页数： | 16/72页 |
| 文件大小： | 0K |
| 描述： | IC REMOTE THERMAL CTRLR 16-QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Obsolescence 11/Feb/2009 |
| 标准包装： | 2,500 |
| 系列： | dBCool® |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 120°C，外部传感器 |
| 精确度： | ±1.5°C |
| 拓扑： | ADC，比较器，风扇速度计数器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 120°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
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ADT7467
If a discrete transistor is used with the ADT7467, the best
accuracy is obtained by choosing devices according to the
following criteria:
? Base-emitter voltage is greater than 0.25 V at 6 m A with
the highest operating temperature.
2N3904
NPN
ADT7467
D+
D ?
? Base-emitter voltage is less than 0.95 V at 100 m A with
the lowest operating temperature.
? Base resistance is less than 100 W .
Figure 24. Measuring Temperature by Using an NPN
Transistor
? There is a small variation in h FE (for example, 50 to
150) that indicates tight control of V BE characteristics.
Transistors such as 2N3904, 2N3906, or equivalents in
SOT ? 23 packages are suitable devices to use.
Table 7. TWOS COMPLEMENT TEMPERATURE DATA
2N3906
PNP
ADT7467
D+
D ?
FORMAT
Figure 25. Measuring Temperature by Using a PNP
Temperature
? 128 ? C
? 125 ? C
? 100 ? C
? 75 ? C
? 50 ? C
? 25 ? C
? 10 ? C
0 ? C
+10.25 ? C
+25.5 ? C
+50.75 ? C
+75 ? C
+100 ? C
+125 ? C
Digital Output (10-bit) (Note 1)
1000 0000 00
1000 0011 00
1001 1100 00
1011 0101 00
1100 1110 00
1110 0111 00
1111 0110 00
0000 0000 00
0000 1010 01
0001 1001 10
0011 0010 11
0100 1011 00
0110 0100 00
0111 1101 00
Transistor
Nulling Temperature Errors
As CPUs run faster, it is more difficult to avoid high
frequency clocks when routing the D+/D ? traces around a
system board. Even when recommended layout guidelines
are followed, some temperature errors may still be attributed
to noise coupled onto the D+/D ? lines. Constant high
frequency noise usually attenuates or increases temperature
measurements by a linear, constant value.
The ADT7467 has temperature offset registers at Address
0x70 and Address 0x72 for the Remote 1 and Remote 2
temperature channels, respectively. By performing a
one-time calibration of the system, the user can determine
the offset caused by system board noise and null it using the
offset registers. The offset registers automatically add an
Offset 64/twos complement 8-bit reading to every
temperature measurement. The LSBs add 0.5 ? C offset to the
temperature reading; therefore, the 8-bit register effectively
+127 ? C 0111 1111 00
1. Bold numbers denote 2 LSBs of measurement in Extended
Resolution Register 2 (0x77) with 0.25 ? C resolution.
Table 8. OFFSET 64 TEMPERATURE DATA FORMAT
allows temperature offsets of up to ? 64 ? C with a resolution
of 0.5 ? C. This ensures that the readings in the temperature
measurement registers are as accurate as possible.
Temperature Offset Registers
Temperature
? 64 ? C
? 1 ? C
0 ? C
+1 ? C
+10 ? C
+25 ? C
+50 ? C
+75 ? C
+100 ? C
+125 ? C
+191 ? C
Digital Output (10-bit) (Note 1)
0000 0000 00
0011 1111 00
0100 0000 00
0100 0001 00
0100 1010 00
0101 1001 00
0111 0010 00
1000 1001 00
1010 0100 00
1011 1101 00
1111 1111 00
Register 0x70 Remote 1 Temperature Iffset = 0x00
(0 ? C Default)
Register 0x71 Local Temperature Offset = 0x00
(0 ? C Default)
Register 0x72 Remote 2 Temperature Offset = 0x00
(0 ? C Default)
ADT7460/ADT7467 Backwards-compatible Mode
By setting Bit 1 of Configuration Register 5 (0x7C), all
temperature measurements are stored in the zone
temperature value registers (Register 0x25, Register 0x26,
and Register 0x27) in twos complement format in the range
? 128 ? C to +127 ? C. (The ADT7468 makes calculations
based on the Offset 64 extended range and clamps the results
if necessary.) The temperature limits must be reprogrammed
1. Bold numbers denote 2 LSBs of measurement in Extended
Resolution Register 2 (0x77) with 0.25 ? C resolution.
in twos complement format. If a twos complement
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADT7467ARQ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 16-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7467ARQZ | 功能描述:马达/运动/点火控制器和驱动器 FAN CNTRLR/INT MON RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| ADT7467ARQZ | 制造商:Analog Devices 功能描述:Temperature Sensor IC |
| ADT7467ARQZ-R7 | 功能描述:板上安装温度传感器 RMT THRM MON FAN CTL RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| ADT7467ARQZ-REEL | 功能描述:板上安装温度传感器 FAN CNTRLR/INT MON RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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